adding zobrist hashing

1 files changed, 27 insertions, 2 deletions

diff --git a/src/main.cpp b/src/main.cpp
index ade22c9..1fa0701 100644
--- a/src/main.cpp
+++ b/src/main.cpp
@@ -7,12 +7,14 @@
 #include <string>
 
 #include "board/board.hpp"
+#include "board/fen.hpp"
 #include "misc.hpp"
+#include "moves.hpp"
 #include "uci.hpp"
 #include "zobrist.hpp"
 
 static void perft(int argc, char *argv[]) {
-  if (argc != 4 || std::string(argv[1]) != "perft") {
+  if (argc < 4 || std::string(argv[1]) != "perft") {
     std::cout << "Usage: ./mono\n";
     std::cout << "       ./mono perft <non-negative depth> <fen>\n";
     exit(1);
@@ -42,14 +44,37 @@ static void perft(int argc, char *argv[]) {
   std::cout << oss.str() << "\n";
 }
 
+static void zobristCmd(int argc, char *argv[]) {
+  if (argc < 3 || std::string(argv[1]) != "zobrist") {
+    std::cout << "Usage: ./mono zobrist <fen> [moves...]\n";
+    exit(1);
+  }
+
+  std::string fen = argv[2];
+  Game game = initBoard(fen, nullptr);
+
+  for (int i = 3; i < argc; ++i) {
+    uint16_t move = UciToMove(argv[i]);
+    MakeMove(move, &game);
+  }
+
+  uint64_t hash = GenerateZobristKey(&game);
+  std::cout << hash << "\n";
+}
+
 int main(int argc, char *argv[]) {
   InitZobrist();
 
-  if (argc == 4) {
+  if (argc >= 2 && std::string(argv[1]) == "perft") {
     perft(argc, argv);
     return 0;
   }
 
+  if (argc >= 2 && std::string(argv[1]) == "zobrist") {
+    zobristCmd(argc, argv);
+    return 0;
+  }
+
   std::cout << engine_info();
   Uci();
   return 0;